Michigan could be the first state to test for driving while under the influence of marijuana

A package of bills before state lawmakers could make Michigan the very first state to adopt a roadside test that would tell police whether a driver is under the influence of marijuana.

Current law allows police to test the blood, breath and urine of drivers pulled over for erratic driving. The proposed legislation now being debated would add a roadside saliva test that could tell police if a driver is impaired by pot.